Dissertation > Transportation > Rail transport > Railway Line Project > Line constructed > Track > Theory of track structure , track design

The Vertical Dynamic Response Analysis of Different Track Types Based on SIMPACK

Author SuShangXu
Tutor TangJinFeng
School Central South University
Course Traffic and Transportation Engineering
Keywords Multi-body system dynamics Finite element method Coupledvibration between vehicle and track Ballast track and ballastless track
CLC U213.21
Type Master's thesis
Year 2012
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This passage chose the vertical vibration response of different types of track as the subject investigated, by using the co-simulation method of SIMPACK combined with ANSYS, established the vertical vibration analysis model for vehicle-track coupling system. calculated the vertical vibration response of ballast track, slab track, bi-block track caused by the high-speed trains.At last, analyzed and contrasted the change regulation of the vertical vibration response caused by train speeds track types and vertical stiffness of the fasteners.The system vibration response of ballasted track and unballasted track increases as the speed increases; when the speed of the train changes from200km/h to350km/h, rail acceleration sleeper acceleration and slab acceleration double increase, while rail veitical displacement,sleeper displacement and slab displacement increase relatively little.From the point of vehicle vibration, train speed mainly affects the rate of wheel load reduction and wheel-rail contact force, but causes little impact to vertical acceleration of the train.under the conditions of the same speed, ballasted track’s system vibration is stronger than unballasted track’s. For the slab track and bi-block track, their rail veitical displacement, vertical displacement of the track plate, wheel-rail vertical contact force,and the rate of wheel load reduction are all quite different, the others between them are not obvious. Relatively speaking, the dynamic characteristics of bi-block track is better than slab track’s.With the vertical stiffness of the fastener increases, the rail displacement rail acceleration, the slab displacement and carbody acceleration decrease; the slab acceleration increases; wheel-rail contact force changes little

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